feat: finish set method in Chunk.java

finish set method in Chunk.java

src/minecraft/App.java

@@ -1,5 +1,9 @@
 import net.minecraft.util.math.MathHelper;
 
+import java.util.Arrays;
+import java.util.Date;
+import javax.swing.*;
+
 /**
  * @author WangTingZheng
  * @date 2020/7/20 20:43
@@ -8,9 +12,8 @@ import net.minecraft.util.math.MathHelper;
 public class App {
 
     public static void main(String[] args) {
-        byte[] te = new byte[255];
         for (int i = 0; i < 255; i++) {
-            System.out.println("i="+i+" i >> 4 = "+(i>>4)+"| i & 15 = "+(i&15));
+            System.out.println("i = " +i + ", i <<4>>4 = "+ (i>>4<<4));
         }
     }
 }